So Tesla says the auto-pilot actually detected the trailer, but thought it was an "overhead sign" that was hanging high enough. What?! So it appears the sensors on Tesla are not precise enough to tell if the car can safely pass under something if it hangs over the road? I mean, come on, I'd be fine if the auto-pilot couldn't tell if the clearance is 10 feet or 12 feet. But a trailer? As far as I can find the standard floor height of a tractor trailer is 48". That means the clearance under is even less. It didn't occur to Tesla to test if the car can detect solid object hanging 4 feet off the ground?? I don't care if the driver was asleep, Tesla should have handled this.
Also, didn't we already have a Tesla hit a trailer in "auto-park" mode a few weeks ago?
What I know for damn sure is that next time I'm test driving a Tesla, or any other car with auto-pilot mode, I'm bringing a two by six with me.